fix preLoading.st

since RPackageOrganizer has gone

Author: demarey

.github/scripts/preLoading.st

@@ -1,3 +1,2 @@
-#( 'BaselineOfSpec2' 'BaselineOfSpecCore' ) do: [ :each | 
-	(RPackageOrganizer default packageNamed: each ifAbsent: [ nil ]) 
-		ifNotNil: [ :aPackage | aPackage removeFromSystem ] ]
+#( 'BaselineOfSpec2' 'BaselineOfSpecCore' ) 
+	do: [ :packageName | self packageOrganizer removePackage: packageName ]